Vortex Motion Modulated by a Self Field in a Large Josephson Junction

Keiji Enpuku, Keiji Yoshida, Fujio Irie, Katsuyoshi Hamasaki

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10 Citations (Scopus)

Abstract

Motion of a vortex array (flux flow) in a large Josephson junction is studied both theoretically and experimentally. An expression for dc current-voltage (I-V) characteristics of a large junction in a flux-flow state, which is caused by the external dc magnetic field and current, is obtained by taking account of the self field due to the dc current through the junction as well as the large loss due to the surface resistance of junction electrodes. It is shown that the spacially uniform flux flow is crucially modulated by the self field in a high-velocity region of the flux flow. As a result, the magnitude of the current peak in I–V curves decreases significantly and saturates with respect to both the length and the quality factor of the junction, which is confirmed by experiments with large Pb-PbxOy-Pb junctions.

Original languageEnglish
Pages (from-to)1973-1978
Number of pages6
JournalIEEE Transactions on Electron Devices
Volume27
Issue number10
DOIs
Publication statusPublished - Oct 1980

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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